Overview
- Researchers analyzed 103,649 adults with at least two validated 24-hour dietary recalls and tracked mortality over a median 10.6 years, recording 4,314 deaths.
- Five established dietary patterns were assessed—AHEI-2010, Alternate Mediterranean, healthful Plant-based, DASH, and the Diabetes Risk Reduction Diet.
- Modeling suggested that, at age 45, men in the highest versus lowest diet-quality quintile gained about 1.9 to 3.0 years of life, while women gained about 1.5 to 2.3 years.
- Diet quality was associated with longer life across genetic risk strata for longevity, with no broad gene–diet interaction detected except a stronger DDRD association in those with lower longevity polygenic scores.
- Authors emphasize public-health relevance but note observational limits, including recall-based diet measures, residual confounding, and limited ethnic diversity, which constrain causal interpretation and generalizability.